Monreal looks a doubt for Saturday, a big doubt, because he twisted his foot on the kick. It is not the bruise, he turned and twisted the ligament.

---End of Update---

Monreal's rare Premier League start was going swimmingly on Monday night, Jan. 13, but it came to an abrupt end when he suffered a foot injury and was forced from the pitch.

The severity of the injury is currently unknown, but according to Arsenal manager Arsene Wenger, via the Telegraph's Henry Winter, the Gunners are going to check to see if the left-back has a broken metatarsal:

Wenger: Rosicky has "a bad nose. Don't know if it's broken, he told me he got an elbow". #afc will check to see if Monreal broken metatarsal

Monreal is comfortable on the ball and clearly capable of moving forward in the attack. If this injury turns out to be serious, the Gunners, who continue to hold off Manchester City and Chelsea atop the table, may have to search the transfer window to find a backup for Gibbs.